SSH [SOLVED]: sftp connection closed after correct password

SSH [SOLVED]: sftp connection closed after correct password

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  • #36527



    I’m running an sftp server on port 10022 using openssh-server on debian, hosted on EC2/AWS. I have configured password-based authentication for a single user, but the server connection is closed immediately after I submit the correct password. Here is the output from the sftp client:

    steve@localhost's password: 
    debug2: we sent a password packet, wait for reply
    debug1: Authentication succeeded (password).
    Authenticated to localhost ([]:10022).
    debug2: fd 4 setting O_NONBLOCK
    debug1: channel 0: new [client-session]
    debug2: channel 0: send open
    debug1: Requesting
    debug1: Entering interactive session.
    debug1: pledge: network
    debug1: channel 0: free: client-session, nchannels 1
    debug1: fd 0 clearing O_NONBLOCK
    Connection to localhost closed by remote host.
    Transferred: sent 1972, received 1644 bytes, in 0.0 seconds
    Bytes per second: sent 1281358.2, received 1068231.7
    debug1: Exit status -1
    Couldn't read packet: Connection reset by peer

    I have the server running inside a docker container, the really weird thing is that if I run the docker container locally on my Mac I can connect just fine, but when I run it on the AWS server I get the problem above. The above output was produced by running the sftp client on the AWS server (trying to connect to localhost) so I don’t think this is anything to do with network access to AWS



    Accepted AnswerAnswer

    I would set LogLevel VERBOSE in /etc/ssh/sshd_config then restart sshd and check /var/log/auth.log to get more details.

    Author: Fabian Köppen
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